Change in Muscle Mass by Subject. Individual responses for changes in Muscle Mass from Baseline to Post Week (Δ). Exercise + FS (EXFS; left); Exercise-alone (EX; center); Control (CON; right). Dashed line represents the mean. Muscle Mass increased significantly over time (p ≤ 0.017) in EXFS, and was significantly greater than CON (p ≤ 0.05).